IFNG and Friedreich ataxia: Kweon et al. observed increased IFN-γ production in the spleen and no IFN-γ production in the colon using ELISA in another murine FA model with allergic diarrhea [21], and Brandt et al. reported no change of IFN-γ mRNA expression in the jejunum of their FA mice with allergic diarrhea [20].